Feeding arm structure welding device and using method

Abstract

The invention discloses a feeding arm structure welding device and a using method thereof.The device comprises two supporting seats, a connecting rod, a driving rotating mechanism, a driven rotating mechanism, a lower supporting frame, an upper supporting frame, a rear positioning structure, a front positioning structure, a supporting stand column and a clamping fixture, and the two supporting seats are connected together through the connecting rod; a driving rotating mechanism and a driven rotating mechanism are mounted on the two supporting seats respectively, and the two ends of the lower supporting frame are connected with the driving rotating mechanism and the driven rotating mechanism respectively; a first supporting column, a second supporting column and a third supporting column are arranged on the lower supporting frame, the rear positioning structure is arranged on the third supporting column, the front positioning structure is arranged on the second supporting column, and the supporting stand column is connected with the front positioning structure through a bolt. One end of the upper support frame is connected with the driving rotating mechanism; and a plurality of clamping fixtures are arranged on the upper support frame. The assembling precision of the feeding arm can be effectively improved, welding deformation is reduced, the welding work efficiency is improved, and the welding seam defect rate is reduced.

Description

Technical Field

[0001] This invention relates to a welding device for a feeding arm structure and its usage method, belonging to the field of feeding arm welding fixtures. Background Technology

[0002] Large-scale stamping production lines are metal sheet processing lines that integrate automation technology and high-speed stamping processes, primarily used in the manufacturing of large automotive body panels. The feeding arm structure is the core component of the automated feeding system in large-scale stamping production lines, serving both positioning and feeding functions. It is typically a high-strength aluminum alloy welded structure. Due to the prolonged cyclic loads during service, cracks and damage occur at the weld seams, ultimately leading to structural aging. The quality of the weld joint has a significant impact on weld fatigue performance; improving weld joint quality is crucial for extending the service life of the feeding arm. Automated welding can effectively improve weld quality and weld formation stability, but the complexity of the feeding arm structure poses challenges to automation implementation. Traditional feeding arm welding typically utilizes simple tooling for clamping and positioning, enabling only single-sided manual welding or semi-automatic robotic welding. Secondary clamping is required for welding the back side, leading to uncontrollable deformation and unstable weld quality during the welding process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a feeding arm structure welding device and a method of use that addresses the deficiencies of the existing technology, thereby increasing the proportion of automated welding of the feeding arm structure and reducing the weld defect rate.

[0004] To solve this technical problem, the present invention provides a welding device for a feeding arm structure, including a support base, a connecting rod, an active rotating mechanism, a driven rotating mechanism, a lower support frame, an upper support frame, a rear positioning structure, a front positioning structure, a support column, and clamping fixtures. Two support bases are provided and connected together by the connecting rod. An active rotating mechanism and a driven rotating mechanism are respectively installed on the two support bases. Both ends of the lower support frame are connected to the active rotating mechanism and the driven rotating mechanism, respectively. The lower support frame has three support columns: a first support column, a second support column, and a third support column. The rear positioning structure is located on the third support column, and the front positioning structure is located on the second support column. The support column is connected to the front positioning structure by bolts. One end of the upper support frame is bolted to the active rotating mechanism, and the other end is bolted to the support column. Multiple clamping fixtures are provided on the upper support frame.

[0005] The active rotating mechanism can be rotated electrically or manually, and the driven rotating mechanism receives the power transmitted by the active rotating mechanism and provides support during rotation.

[0006] The inner sides of the active rotating mechanism and the driven rotating mechanism are respectively provided with connecting turntable one and connecting turntable two. The two ends of the lower support frame are respectively bolted to the active rotating mechanism 3 and the driven rotating mechanism through connecting turntable one and connecting turntable two.

[0007] The lower support frame is provided with a long groove, and the support column three is set on the long groove and can be adjusted in position along the horizontal direction of the long groove.

[0008] The rear positioning structure includes an L-plate and two side positioning blocks, which are connected by a base plate with through holes. The bottom of the L-plate has an elongated hole, and the L-plate is bolted to the middle of the base plate between the two side positioning blocks and can be moved back and forth to adjust its horizontal position.

[0009] The upper end of the second support column is a cross-shaped structure, and each of the four ends of the cross-shaped structure is provided with an elongated hole; the front positioning structure includes four positioning blocks, each of the four positioning blocks has a quarter-circular frustum at the front and a square structure at the rear, and the square structure has an elongated through hole in the middle. The four positioning blocks of the front positioning structure are bolted to the cross-shaped structure at the upper end of the second support column, and the axial position of the positioning blocks can be adjusted through the elongated holes.

[0010] The present invention also provides a method of using the above-described feeding arm structure welding device, wherein the feeding arm structure includes a feeding arm bushing, a feeding arm base plate, a feeding arm side upright plate, a feeding arm rear upright plate, and a feeding arm upper cover plate, and the method of use includes the following steps: S1. Assembly and Position Adjustment: Install the feeding arm bushing on the front positioning structure. Position the feeding arm bushing by adjusting the axial position of the positioning block. Fit the feeding arm bottom plate ring onto the outer diameter of the feeding arm bushing. Position the feeding arm bottom plate using the outer diameter of the feeding arm bushing and the rear positioning structure. Position the feeding arm rear upright plate by adjusting the L plate on the rear positioning structure. Position the feeding arm side upright plate using the feeding arm bushing, the feeding arm rear upright plate, and the side positioning block on the rear positioning structure. S2, Positioning spot welding: Spot weld the feeding arm bushing to the feeding arm bottom plate, spot weld the feeding arm side upright plate to the bottom plate, and spot weld the feeding arm rear upright plate to the feeding arm side upright plate and the feeding arm bottom plate. S3. Cover plate assembly and clamping: Fit the ring of the upper cover plate of the feeding arm onto the outer diameter of the feeding arm bushing, and use the outer diameter of the feeding arm bushing and the rear positioning structure to position the upper cover plate of the feeding arm; connect one end of the upper support frame to the connecting turntable of the active rotating mechanism with bolts, and connect the other end to the support column with bolts; clamp the upper cover plate of the feeding arm with clamping fixtures to clamp and limit its position; S4. Welding and disassembly: After completing S1, S2 and S3, the feeding arm is welded. During the welding process, the feeding arm is rotated to achieve welding at different positions. After welding is completed and cooled, the clamping fixture is opened, the upper support frame is removed, the position of the L plate on the rear positioning structure and the positioning block of the front positioning structure is adjusted, and the feeding arm sample is removed.

[0011] Beneficial Effects: This invention can be used in the welding and assembly of feeding arms. It utilizes a rear and front positioning structure to achieve rapid positioning of the feeding arm, and a lower and upper support frame to achieve rapid clamping of the feeding arm, effectively improving the assembly accuracy of the feeding arm and reducing welding deformation. The feeding arm welding device of this invention can achieve clamping and welding of the feeding arm with the correct structural dimensions by adjusting the L-plate of the rear positioning structure and the positioning block of the front positioning structure. The feeding arm welding device of this invention can safely and smoothly rotate the feeding arm to the optimal welding angle (such as 0°, 90°, 180°, etc.) to improve welding efficiency and reduce labor intensity. The feeding arm welding device of this invention can cooperate with robots to achieve automatic welding, increasing the proportion of automated welding of the feeding arm structure, improving weld quality and welding formation stability, reducing weld defect rate, and thus improving the fatigue life of the welded joint of the feeding arm. This invention provides key technical guarantees for the stable operation of large-scale stamping production lines and the long-term reliability of feeding arms. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the active transmission mechanism of the present invention; Figure 3 This is a schematic diagram of the driven transmission mechanism of the present invention; Figure 4 This is a schematic diagram of the lower support frame of the present invention; Figure 5 This is a schematic diagram of the post-positioning structure of the present invention; Figure 6 This is a schematic diagram of the front positioning structure of the present invention; Figure 7 Assembly diagram for implementing the present invention Figure 1 ; Figure 8 Assembly diagram for implementing the present invention Figure 2 .

[0013] In the diagram: 1. Support base; 2. Connecting rod; 3. Active rotating mechanism; 4. Driven rotating mechanism; 5. Lower support frame; 6. Upper support frame; 7. Rear positioning structure; 8. Front positioning structure; 9. Support column; 10. Clamping fixture; 31. Connecting turntable one; 41. Connecting turntable two; 51. Support column one; 52. Support column two; 53. Support column three; 71. L-plate; 72. Side positioning block; 81. Positioning block; 111. Feeding arm bushing; 112. Feeding arm bottom plate; 113. Feeding arm side upright plate; 114. Feeding arm rear upright plate; 115. Feeding arm upper cover plate. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] like Figures 1-8 As shown, this invention provides a welding device for a feeding arm structure, including a support base 1, a connecting rod 2, an active rotating mechanism 3, a driven rotating mechanism 4, a lower support frame 5, an upper support frame 6, a rear positioning structure 7, a front positioning structure 8, a support column 9, and clamping fixtures 10. Two support bases 1 are provided and connected together by the connecting rod 2 to ensure the overall welding device has a certain rigidity. The bolt connection allows for quick assembly and disassembly of the welding device. The active rotating mechanism 3 and the driven rotating mechanism 4 are respectively installed on the two support bases 1. The lower support frame 5 is connected to the active rotating mechanism 3 and the driven rotating mechanism 4 at both ends. The lower support frame 5 is provided with a first support column 51, a second support column 52, and a third support column 53. The rear positioning structure 7 is located on the third support column 53, and the front positioning structure 8 is located on the second support column 52. The support column 9 is connected to the front positioning structure 8 by bolts. One end of the upper support frame 6 is connected to the active rotating mechanism 3 by bolts, and the other end is connected to the support column 9 by bolts. Multiple clamping fixtures 10 are provided on the upper support frame 6.

[0016] The active rotating mechanism 3 can be rotated electrically or manually, and the driven rotating mechanism 4 receives the power transmitted by the active rotating mechanism 3 and plays a supporting role when rotating.

[0017] The inner sides of the active rotating mechanism 3 and the driven rotating mechanism 4 are respectively provided with connecting turntable 31 and connecting turntable 41. The two ends of the lower support frame 5 are respectively bolted to the active rotating mechanism 3 and the driven rotating mechanism 4 through connecting turntable 31 and connecting turntable 41.

[0018] The lower support frame 5 is provided with a long groove, and the support column 3 53 is set on the long groove and can be adjusted in position along the horizontal direction of the long groove to adapt to the welding positioning requirements of feeding arms of different lengths.

[0019] The rear positioning structure 7 includes an L-plate 71 and two side positioning blocks 72. The two side positioning blocks 72 are connected by a base plate, which has through holes. The L-plate 71 has an elongated hole at its bottom. The L-plate 71 is bolted to the middle of the base plate between the two side positioning blocks 72 and can be moved back and forth to adjust its horizontal position. The position of the L-plate 71 on the rear positioning structure 7 can be finely adjusted by the elongated hole at the bottom of the L-plate 71 to achieve precise positioning.

[0020] The upper end of the second support column 52 is a cross-shaped structure, and each of the four ends of the cross-shaped structure is provided with an elongated hole; the front positioning structure 8 includes four positioning blocks 81, each of the four positioning blocks 81 has a quarter-circular frustum at the front and a square structure at the rear, and the square structure has an elongated through hole in the middle. The four positioning blocks 81 of the front positioning structure 8 are bolted to the cross-shaped structure at the upper end of the second support column 52, and the axial position of the positioning blocks 81 can be adjusted through the elongated holes to achieve precise positioning of the feeding arm bushing.

[0021] The present invention also provides a method for using the above-described feeding arm structure welding device, wherein the feeding arm structure includes a feeding arm bushing 111, a feeding arm base plate 112, a feeding arm side upright plate 113, a feeding arm rear upright plate 114, and a feeding arm upper cover plate 115, comprising the following steps: S1. Assembly and position adjustment: Adjust the position of the second support column (52) on the lower support frame (5) according to the current length of the feeding arm; install the feeding arm bushing 111 on the front positioning structure 8, and realize the positioning of the feeding arm bushing 111 by adjusting the position of the positioning block 81 in the axial direction. The ring of the feeding arm bottom plate 112 is fitted on the outer diameter of the feeding arm bushing 111. The positioning of the feeding arm bottom plate 112 is realized by the outer diameter of the feeding arm bushing 111 and the rear positioning structure 7. The positioning of the feeding arm rear upright plate 114 is realized by adjusting the L plate 71 on the rear positioning structure 7. The feeding arm side upright plate 113 is positioned by the feeding arm bushing 111, the feeding arm rear upright plate 114 and the side positioning block 72 on the rear positioning structure 7. S2. Positioning spot welding: Spot weld the feeding arm bushing 111 to the feeding arm base plate 112, spot weld the feeding arm side upright plate 113 to the base plate, and spot weld the feeding arm rear upright plate 114 to the feeding arm side upright plate 113 and the feeding arm base plate 112. S3. Cover plate assembly and clamping: Place the annular part of the upper cover plate 115 of the feeding arm onto the outer diameter of the feeding arm bushing 111, and use the outer diameter of the feeding arm bushing 111 and the rear positioning structure 7 to position the upper cover plate 115 of the feeding arm; connect one end of the upper support frame 6 to the connecting turntable 31 of the active rotating mechanism 3 by bolts, and connect the other end to the support column 9 by bolts; clamp the upper cover plate 115 of the feeding arm by clamping fixture 10 to press and limit its position. S4. Welding and disassembly: After completing S1, S2 and S3, the feeding arm is welded. During the welding process, the feeding arm is rotated to achieve welding at different positions. After the welding is completed and cooled, the clamping fixture 10 is opened, the upper support frame 6 is removed, the position of the L plate 71 on the rear positioning structure 7 and the positioning block 81 of the front positioning structure 8 are adjusted, and the feeding arm sample is removed.

[0022] Using the welding device of the present invention, the feed arm weld produced by automatic welding with a robot has a uniform and smooth appearance, consistent weld width, and internal quality that meets the requirements of NB / T 47013.2 weld grade II; the overall deformation of the feed arm after welding is ≤1mm.

[0023] This invention, through the cooperation of the rear positioning structure, the front positioning structure, the support column on the lower support frame, and the clamping fixture, can limit the position of feeding arm structures of different sizes, ensuring that the feeding arm will not shift during welding. After spot welding and fixing the main structure of the feeding arm, the clamping fixture and the support column of the lower support device limit the upper and lower positions of the feeding arm, ensuring the positional accuracy of the feeding arm during welding, thereby ensuring the positional stability of the feeding arm during welding and preventing welding deformation, thus improving the welding efficiency and welding quality of the feeding arm.

[0024] This invention is mainly applied in the welding process of feeding arm structures. Technically, it can use feeding arm structures of different sizes to provide stable support and precise positioning during the welding process. In particular, it can achieve precise positioning in the length and height directions of the feeding arm and play a clamping role. At the same time, it can meet the needs of automatic welding by robots, improve welding efficiency, reduce labor intensity, improve weld quality and weld formation stability, and provide technical guarantee for the long-term reliability of the feeding arm welded joint.

[0025] The above embodiments of the present invention are merely illustrative examples and are not the only ones. All modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A welding device for a feeding arm structure, characterized in that: The system includes a support base (1), a connecting rod (2), an active rotating mechanism (3), a driven rotating mechanism (4), a lower support frame (5), an upper support frame (6), a rear positioning structure (7), a front positioning structure (8), a support column (9), and a clamping fixture (10). Two support bases (1) are provided and connected together by the connecting rod (2). An active rotating mechanism (3) and a driven rotating mechanism (4) are respectively installed on the two support bases (1). The lower support frame (5) is connected at both ends to the active rotating mechanism (3) and the driven rotating mechanism (4). 4) Connection; The lower support frame (5) is provided with support column one (51), support column two (52) and support column three (53), the rear positioning structure (7) is set on support column three (53), the front positioning structure (8) is set on support column two (52), and the support column (9) is connected to the front positioning structure (8) by bolts; one end of the upper support frame (6) is connected to the active rotation mechanism (3) by bolts, and the other end is connected to the support column (9) by bolts; the upper support frame (6) is provided with multiple clamping fixtures (10).

2. The feeding arm structure welding device according to claim 1, characterized in that: The active rotating mechanism (3) can be rotated electrically or manually, and the driven rotating mechanism (4) receives the power transmitted by the active rotating mechanism (3) and plays a supporting role when rotating.

3. The feeding arm structure welding device according to claim 1, characterized in that: The active rotating mechanism (3) and the driven rotating mechanism (4) are respectively provided with connecting turntable one (31) and connecting turntable two (41) on their inner sides. The two ends of the lower support frame (5) are respectively bolted to the active rotating mechanism (3) and the driven rotating mechanism (4) through connecting turntable one (31) and connecting turntable two (41).

4. The feeding arm structure welding device according to claim 1, characterized in that: The lower support frame (5) is provided with a long groove, and the support column three (53) is set on the long groove and can be adjusted in position along the horizontal direction of the long groove.

5. The feeding arm structure welding device according to claim 1, characterized in that: The rear positioning structure (7) includes an L plate (71) and two side positioning blocks (72). The two side positioning blocks (72) are connected by a base plate, and the base plate has through holes. The bottom of the L plate (71) has elongated holes. The L plate (71) is bolted to the middle of the base plate between the two side positioning blocks (72) and can be moved back and forth to adjust its horizontal position.

6. The feeding arm structure welding device according to any one of claims 1-5, characterized in that: The upper end of the second support column (52) is a cross-shaped structure, and each of the four ends of the cross-shaped structure is provided with an elongated hole; the front positioning structure (8) includes four positioning blocks, the front of the four positioning blocks is provided with a quarter-circular frustum, and the rear is a square structure, the middle of the square structure is provided with an elongated through hole, the four positioning blocks of the front positioning structure (8) are set on the cross-shaped structure at the upper end of the second support column (52) by bolts, and the axial position of the positioning block 81 can be adjusted through the elongated hole.

7. A method of using the feeding arm structure welding device according to any one of claims 1-6, wherein the feeding arm structure includes a feeding arm bushing (111), a feeding arm base plate (112), a feeding arm side upright plate (113), a feeding arm rear upright plate (114), and a feeding arm upper cover plate (115), characterized in that, Includes the following steps: S1. Assembly and Position Adjustment: Install the feeding arm bushing (111) on the front positioning structure (8). Position the feeding arm bushing (111) by adjusting the axial position of the positioning block (81). The feeding arm bottom plate (112) is fitted onto the outer diameter of the feeding arm bushing (111). Position the feeding arm bottom plate (112) using the outer diameter of the feeding arm bushing (111) and the rear positioning structure (7). Position the feeding arm rear upright plate (114) by adjusting the L plate (71) on the rear positioning structure (7). Position the feeding arm side upright plate (113) using the feeding arm bushing (111), the feeding arm rear upright plate (114), and the side positioning block (72) on the rear positioning structure (7). S2, Positioning spot welding: Spot weld the feed arm bushing (111) to the feed arm bottom plate (112), spot weld the feed arm side upright plate (113) to the bottom plate, and spot weld the feed arm rear upright plate (114) to the feed arm side upright plate (113) and the feed arm bottom plate (112). S3. Cover plate assembly and clamping: Place the ring of the upper cover plate (115) of the feeding arm onto the outer diameter of the feeding arm bushing (111). Use the outer diameter of the feeding arm bushing (111) and the rear positioning structure (7) to position the upper cover plate (115) of the feeding arm. Connect one end of the upper support frame (6) to the connecting turntable (31) of the active rotating mechanism (3) with bolts, and connect the other end to the support column (9) with bolts. Use the clamping fixture (10) to clamp and limit the upper cover plate (115) of the feeding arm. S4. Welding and disassembly: After completing S1, S2 and S3, the feeding arm is welded. During the welding process, the feeding arm is rotated to achieve welding at different positions. After the welding is completed and cooled, the clamping fixture (10) is opened, the upper support frame (6) is removed, the position of the L plate (71) on the rear positioning structure (7) and the positioning block (81) of the front positioning structure (8) is adjusted, and the feeding arm sample is removed.

Images